Valve core, container, and stem



J rL'30,1-940;

I H. Z. GORA iALVE CORE, 1 CONTAINER, AND STEM- 2 Sheets-Sheet 1 FiledJune 21 1937 Jan. 30,. 1940. H. -z. GORA VALVE onn, CONTAINER, AND swam2 she ets sheet I 2 Filed June 21, 19:57

. 3 Hen/y Z Gar-w, m, WD M ratmeum 30;. f,

mesa-13 vim com-1,1 CONTAINER; s'rarrf Henry ohm;

Jenkins Brosz,

Bridgeport; Conn, assignor to Bridgeport; Gonna a corpora The. presentiinvention relates: to: valve associated-therewith; a principal? of, the;invention; being tOyprovide a .valvest'em,

preferably-v capless,z-.withasimplifled but eflicient removablavalverprovisions." I'shall-describe prac tical. embodiments of' theinvention; by way" of T example-,a.-,withr. reference tothe faccompanying" 1:v drawingsimwhich:

- Figure :1 is an. elevationof arubber .valvestem embodying theinvention;

Figure -2 -is an: enlarged axial section of the tipendroftherstemrxofzlii'gurerl;

and -aam'odifledwi corer containen' and.

IIL'. The .core is shownr-by itself in'Fl'gure in operative associationwith a container: H in 30; Figures 2 "andr3, the container l l inltheseflgures being shown as. disposed in the tiptportion of a flexible rubbervalve stem body 12 which as shown in Figure 1 rises from a base flap 13.1-

The core I comprises abarrel -ll which-has 35,112- topexternal flangeIS; a medial external Iii-:and. circumferentialflns or ribs -"l'l' thevflange I6-,the-1ower extremity of'the being tapered toa substantiallyline "edge." Se,-

cured to'the barrel below the flange l5,-preferably by vulcanization ina molding operation, a tubularrubber body l8-='whic h constitutes a partof- 'the barrel. Externally the rubber body" l8 is substantiallycylindrical at itsupper portion,

being tapered therefrom to a lower'depending' skirt'portion" IQ of--'restricted. diameter; the portion? I9 *as. here. shown being cylindricalnallyf andrinternally and being internally flush with the lower portionof the barrel bore. At' itsaextremity the skirt portion IQ hasYa Thebore20. is surmounted"by *"innervedge 2 L.

ae. bore;- portion 22 of larger diameterso that a shoulder orledgen isprovided.

Aniexternally threaded plug portion" fl xhas abore 25. of thesame'size-v as the boreportion uygfiriiandr has a smooth depending skirt26 whose- I Figure-3 .is' a. section-similar to that of 'Figure" 2 but;with: the valve .partsin idiflerent relation;

Figured is; a perspective-view of the news'corey Figure 5' a.-sectionasubstantia'lly on bline- Figurer'6 K132 a evie'msimilarto that yor Figure" 3 butishowingaa-=slightlyzmodifiedformiofi-corer Figure 7 isa viewsimilar to" thatzof' Fi'gure' 3 butzishowing another/modificationof the: core Figure :8 is a section'v on line r-lbf Figure 6.Referringfirs t to Figures 1 to 5, the new coreisvdesignated:generallysbythe referencernumeral' lower portion-is =spun'iover 'thea flange i 5' so that the plug portion 'an'd barrel areswiveled together. The plug portion 21" has a* p"aii'- or; diametricallyopposite'upstandingi similar lugs" and 28 formed thereon, I ,1 A' valvepin 29 is positionedlwithin the barrel and plug portion to be freelyaxially movable relativethereto and carries at it's lower-end a conicalvalve body- 30 wl'iichis'preferabiy formed integral therewith. The valvebody 30 is of a 10 size to oooperate'with the edge 21 as aseat and isproportioned to extendin both directions past the seat'when operativelyengaged with the latter'a'sshown iniFigure 3; f IThe'upper'reduced'end'of th'e'pin 29 is r'e- 1g ceived in a centralopening'in a circular head 3'l',"the=extremity of the-'pinbeing rivetedover ashere shown iinbrder' tose'cure the parts together; 'Atitsundersideithe head is provided with" a diametrical groove '32 whoseend walls are g spaded iapartl a dista'nce which -is slightly greaterthan the-w'idth of the lugs-il and 28, the central portion of the groovebeingsomewhat expanded as showu ini Figure 5.: Thetopof head 3| hasformed thereon a transverserib 33; Interposed g between-the top-wall'ofgroove 32 and ledge 23, isa volute compression-spring which acts to pullthe-valve body ill against the seat Zlwith a radial spreading tendehcybnthe lower portlODQDf skirt l9. so The tubular container H is preferablyof cir-'- cular section throughout; Its"circul'ar upper end opening 35is only slightly largerthan the head 3'l'so' that the latter, withoutany unnecessary clearance,- is freely; slidable therein. Below the 35end opening-35* the inserthas aninterior annular enlargement 3 6 whichis of appreciably larger diametenthan the diameter'of head 3|. Below theenlargement 36 the insert is interiorly annularly contracted at 31 andprovided with 40 threads w'which are operatively' engageable by thethreads of the plug' portion, 24': Below the threads the interiorsurface of the insert is substantially cylindrical at- 39 downtoaninwardly tapered-seat "lll'below which is a flared surface 4 IExternally the lower portion of the" insert 3 may be provided with"progressively enlarging ciri aumferentialribs or 1 object 1 flange belowbarrel exter I shown; is embedded" inthetip portion of the rubber body I2 ftoibecompletely laterally covered thereby; being-vulcanized thereinduring-a molding 'operatiorn The" 'fl'are'd portionl 4]" of the 'I'hecontaineror; tubular insert-:lLf'as here so I insert'is covered-by'amolded band'fl" of rubber and 28 whereupon the head may be turned toscrew the plug portion 24 to the position shown in Figures 2 and 3. Therib'33 may be engag'ed' by a suitable tool so that the head may be.positively rotated. Any other provisions whereby the head maybe engagedby a suitable tool may be usedas well as any other suitable meanswhereby rotative movement of the head may transmitted to the plugportion. In Figure} the core is contemplated as just hayingbee'nturne'd'to final position in the container. rhe tapered portion or therubber body I8, is seeteu'tighuy against the shoulder 40, but,

' as shown, there is a slight clearance between the skirt I9 and therubber bore portion 42. When the head is no'wreleased the spring 34lifts the valve body 30'into engagement with the seat 21,"

but notquite to the'position shown 'in Figure3 and the itop'sur'face "ofthe headat the sides of the the rib is" not quite flush with the top ofthe insert. The skirt I9 is not appreciably or' di narily, distortedunder the conditions assumed, since the force of the spring'ispreferably such in relation to the radial yieldability of the skirt thatthe latter. is not appreciably spread. However, when the tube with whichthe valvestem is associated fis fllledfwith air, the valve body ,30forced upwardly relativefto the container I I so that'the part's' jtakethe relation .shoW'n in Figure 3, the skirt l9 being spread into sealingcontact with the rubber bore portion 42. Not only does this assist inpreventing air from leaking up: wardly between the barrel and container,but'it also provides a lap for the joint between the upper end of theband of rubber 42 and the surmounting portion of the insert so that airis most efiectively prevented from getting between the lower end of theinsert and body l2. I

If it is desired to remove the core the head is pressed inwardly intoengaging relation with the plug portion and the latter is turnedout. The

barrel immediately follows'the' plug portion upwardly due to the swivelconnection between the two parts. i a

As above stated, in the absenceof air pressure on the lower end'of valve'body 30, theskirt will be substantially in the undistorted conditionshown in Figures 2 and 4, since it able to withstand the spreadingtendency of thevalve,

body. Evenif it should be spread, itwill immediately resume itsundistorted-condition when the coreis assembled withthe container andwill formno' obstruction to the insertion of the core due to the factthat the valve body-is moved out of-the skirtlS when the head isclutched with the plug portion.

The edge 2| forms an initial line contact 1 theconical body 30 and thisis of importance in securing aproper seal. When the head is in theupperv end of the insert as shown in Figure 3, it

is positively centeredand the axis 01 the valve 'body is maintainedperpendicular to the plane of the circular edge'so that uniformcircumferential contact isjassured.

*Wn'en the valve h'ead isin the position shown in Figure 3, the stem iseffectively closed against ingress of foreign matter such as dustand'water.

In the inflating operation the head is moved by the usual chuck pin to aposition in enlarge ment 36 so that air is enabled to pass the-head.

The space between the bottom of the valve head andthe top of the plugportion lugs is preferably greaterthan the unseating movement of thehead? I in the inflating operation.:Qtherwiseit would 10 the groove ofthe head always in register with i be necessaryto provide means'formaintaining the lugs.

The corelcontainer need not necessarily be a' part-of arubber valvestembut could be con I stituted by a portion of a metal valve stem, as isobvious.

The arrangement? shown in Figures 6 and 8 is When this core assembledwith *the'insert the barrel reaches "its seating position by an initial]direct rectilinear movementand relative depression of the headbrings thelatter into' engage ment with the plug-portion which can-thenbe turnedto'position," forcing the barrel against its seat." Since the plugportionand barrel are not connected together the latter will not followthe ,former when it is unscrewed and-must be pulled" out after theplug-portion is unscrewed: If it should be required that the spreadingtendency of the valve bodybe immediately relieved at'the I start of theassembly operation the seat for the lower end of the spring may beplaced .onl'the plugportion instead or 'on'the'barrel. In *such case theplugportion is'merely provided with an internal annular ledge ofsuflicient width'to're ceive the lower end of the spring securely'andthespring is made of'appropriate length. The container need not beconfined in length to the tip portion or the stem, although it should" Ibe if it is desired to provide'a' stem of the utmost flexibility. InFigure 7 I'haveshown'a container 45 which is of greater length than thecontainer previously described, extending even to the lower extremity ofthe stem, if 'desir'd'. Also, in--the construction shown in Figure 7-,the plug portion 46 and barrel 41 are integrally joined.

The stem body 12 is'of rubber or rubber composition designedwith-particular referenceto the requirements of a flexible rubber valvestem and these are notalwa'ys consistent with the best heat resistingand sealing'qualities'. The rubber valve portion l8," being separatefrom'the 'stem= body, can emphasize thesev'latter qualities." The term"rubber as used herein includesany suit able composition of rubber orother materials of v similar characteristicso In the drawings, the stemsare shown inupright position and the terms "upper" and lower" 7 are usedherein with reference to that position and merelyas a matter-ofconvenience. Variations from the specific disclosuresherein are; ofcourse, possible "without departure from. the invention and accordingly=I do not: limit myself as to details 'of' form and arrangement "exceptas" in the following claims.

- 1; A valve core comprising a barrel which in-' cludes afreelydepending flexible rubber skirt portion at its inner end; a yalvepin=extending freely axially ofsaid barrel, a conical valve body carriedby the inner end ofsaid'pin and adaptedto seat against said skirtportion at thepfree end two are;bro,ught together,

threaded plug portion-having an axial opening in which a portion of thepin intermediate said barrel and head ismoably received, a compressionspring surrounding said pin andbearin'g at vone end againstsaid head soas normally to seat said valve body, said head being spaced from saidplug v.portion when said valve body is seated, and means on said headandplug portion respectively which interlock for the purpose oftransmitting rotative movement of the former to the 'latter when the 2.A valve-core comprising a barrel which includesafreely dependingflexible rubber skirt portion at its inner end,.-a freely axially ofsaid barrel, a conical valve body carried by the inner end of said pinand adapted to, Seat against said skirt portion at the free end of thelatter with a radial spreading tendency thereon, a head on the other endof said pin, a.

threaded plug portion havingan axial opening in which a portion of thepin intermediate said bar-' rel and head is movably receiv' d, acompression spring surrounding said pin and bearing, at one end againstsaid head was normally to seat said valve body, said spring maintainingsaid head in spaced relation to said plug portion when said valve bodyis seated, and means on said head tion respectively whichinterlock forthe purpose carried by the inner end of and plug portion respectivelywhich interlock for the purpose of transmitting rotative movement of theformer to the latter when the two are brought together. i

3. A valve core comprising a barrel which includes a freely dependingflexible rubber skirt portion at its inner end, a valve pin extendingfreely axially of said barrel, a conical valve body said pin and adaptedto seat against said skirt portion at the free end of the latter with aradial spreading tendency thereon, a head on the other end of said pin,a

threaded plug portion having an axial opening in which a portion of thepin intermediate said barrel and head is movably received, a compressionspring surrounding said pin and bearing at one end against said head soas normally to seat said valve body, said head being spaced from saidplug portion when said valve body is seated,

the seating pressure exerted'by said spring being insufllcient to spreadsaid skirt portion appreciably, and means on said head and plug poroftransmitting rotative movement of the former to the latter when the twoare brought together.

4. A valve core comprising a barrel which includes a freely dependingflexible rubber skirt portion at its inner end, a valve pin extendingfreely axially of said barrel, a conical valve body carried by the innerend of said pin and adapted to seat against said skirt portion at thefree end of the latter with a radial spreading tendency thereon, a headon the other end of said pin, a threaded plugportion having an axialopening in which a portion of the pin intermediate said barrel and headis movably received, said barrel and plug portion being formed asseparate parts, acompression spring surrounding said pin and bearing atone end against said head so as nor-' mally to seat said valve body,said head being spaced from said body is seated, and means on saidhead-and plug portion respectively which interlock for the purpose oftransmitting rotative movement of the former to the latter whentogether.

thereon, 'a head, 'on

valve pin extendingf plug portion when said valve the two are brought s.5. Aivalve, core comprising a, barrel which includes, a. freelydepending flexible rubber skirt portion at its nner fend," a valve" pmextending freelyaxiaily of said barrel, a conical valve body carriedbytheinner endof' said pin and adapted toseatffagainst said'skirt portionat" the free end. of the. latter ,witha radial spreading ter'idency theother end of. said pin, a threaded plugportior' having an axial openingin which'a portion'ofthe pin intermediate said barrel,,h ead is ovably'received, said''barrel and plug portion 'being" formed as separate iparts which alie swiveled together, a compression spring surrou' dingsaid pin end against said head so as normally to: seat said valve bodyplug portion when said valve body is seated, and means on saidheadandplug portion respectively which interlock for the purpose {oftransmitting said head beingspace'd'from said rotative movement of theformer to 'the latter when the two are brought together.

- 6." A valve stem comprising a rubber body having a through bore, acore container embedded in said body and lining one' end of said bore,

, a valve core in-said container, said core including a barrel which hasa flexible rubber skirt portion projecting beyond the inner end of saidcontainer to. lap the walls of the bore therebeyond, and a conical valvebody adapted to seat in the free end of said skirt with a tendency tospread the latter into external sealing contact with said walls.

'1. A valve stem comprising a rubber body having a through bore a corecontainer embedded in said body and liningone end of said bore, a valvecore in said container, said core'including a barrel which has aflexible rubber skirt portion projecting' beyond and lapping the jointbetween the inner end of said container and the contiguous walls of saidbore, and a conical valve body adapted to seat in the free end of saidskirt portion with a tendency to spread the latter into external sealingcontact with said walls.

8. A valve stem including a core container and a core operativelyretainable in said container, said core comprising a barrel whichincludes a depending flexible rubber skirt portion of tubular form atits inner end, said skirt portion having a sharp inner edge at its freeend, a valve pin extending freely axially of said barrel, a conicalvalve body carried by the inner endof said pin and adapted to bearagainst said edge as a seat with an initial line contact, said valvebody being longer than its possible zone of contact with said edge sothat its conical surface projects in both directions past'the seat inall cooperative relations of said valve body and seat, spring meansnormally seating said valve body, and a head on the outer end of saidpin and substantiallyfilling the'outer end portion of said containerwhen said valve body and seat are in cooperative relation, saidcontainer being interiorly enlarged inwardly of said outer end portionand the head being freely slidable .in said portion and being movableinto the container enlargement relative-to said barrel.

9. A valve stem comprising a rubber body hav and hearing at oneing athrough bore, a tubular core container embedded in said body and lining,one end of said bore, the inner end of said container being interiorlyannularly overlapped by the body material, a valve core in saidcontainer, said core including a barrel which has a flexible rubberskirt portion projecting beyond and overlapping the joint between thefirst overlap'and the core confree end or saidi sklrt -portion with atendency to spread the latter against theborebortionscontiguous-tosaidjjoint. s

' 10. A valvestem ocomprising a.frubber bddy having 8; through -b0r,e, atubular 'core container embedded in said body and lining one end vo frsaid bore, the inner end of :said rc ntainer -being interiorlyannularly'overlapped by the xbodyl material, e,v valve core in saidcontainer; saidcoreinchiding a. barrel-which hasgafiexiblehrubbera'skirtportion projecting: beyond and overlapping :the

joint between the firsizaove'rlapandflthe core container, end a valvebod-y adapted to'--seat;in 'the free'end of said skirt portion-with a;tendency t0 spread the latter. againstv the bore portions contiguous tosaidjoint, the spreading tendency of said valve body being in proportionto the Fair pressure aLflFecting the valve body.

said bore, '-the inner end-gbfsaid containefiibeing .interiorl yannuIarIyIo erIappedL- by the bodyfma- 1 .;teria1; "a valve more ansaid--con 1:ainer,* said can ineluding .a. barrel which has n 'a flexibleirrubber skirt.a portion :of -ciroular cross-section,ieproject 1 ing'beyond and 'overlappingaFthe Ij oint '-.between 1 '1"the firstoverlapgandithe "core container,= saidfq ro- "j jec'ting; "skirt31301431011 --1n 'fits i- -natural, sconditio'nf shaving an external'diameter appreciably-Jess thanthe diameterro'f thei boremt said',iidinh 'and a" conical via;lve'ihczjd cooperatingewith the free v "endofr's'laid eseaseati'and adapted .-'to3spre9;d;f1'

' said'prejeoting f'skzlrt gportion into "sealing" contact with "thebore:portionsieontiguousto said- 10" t.

